$(document).ready(function(){
	$('#box').hide();
	$('#mypic').hide();
	$('#hello').click(function(){
		$('#box').show('slow');
		$('#mypic').hide('slow');
	});
	$('#pic').click(function(){
		$('#box').hide('slow');
		$('#mypic').show('slow');
	});
});
/*speed分为fast,normal,slow,也可用微秒来表示
 * 100代表1秒,slow=600,fast=100
 * */